Fossil

  if( file_size(zDbName, ExtFILE)<1024*3 ){
    char *zHome = file_dirname(zDbName);
    int rc;
    if( file_isdir(zHome, ExtFILE)==0 ){
      file_mkdir(zHome, ExtFILE, 0);
    }
    rc = file_access(zHome, W_OK);
    fossil_free(zHome);
    if( rc ){
      if( isOptional ) return 0;
      fossil_fatal("home directory \"%s\" must be writeable", zHome);
    }
    db_init_database(zDbName, zConfigSchema, (char*)0);
    fossil_free(zHome);
  }
  if( file_access(zDbName, W_OK) ){
    if( isOptional ) return 0;
    fossil_fatal("configuration file %s must be writeable", zDbName);
  }
  if( useAttach ){
    db_open_or_attach(zDbName, "configdb");